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(जन 6 जलन तय L sl -समान्तर म्रणी का e o 20+ 5 W A ward 20 पदों का थोग’ v ‘e e4nq |
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Answer» first term = 2*1+57second term = 2*2+59sum of 20 terms will ben/2(2a+(n-1))dn=20 a= 7 d= 2answer will be 520 |
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